Some people think that AngleGuide can be used for only large knives.
But you can use AngleGuide for sharpening narrow knives too.
Apply knife in the middle of AngleGuide and try to use your muscle memory to keep consistent angle.
Watch this video at 0:36.

There is absolutely no difference if your knife is wide or narrow.
For both wide and narrow knives you use your muscle memory.
AngleGuide is your starting reference point.